[sdiy] Low Frequency Square to Sine Waveshaper

[Paul Perry]

I'd agree that the idea of a high frequency clock divided down & driving a
kind of sine construction - the approach made famous by Don Lancaseter, eg
at www.tinaja.com/glib/stepsynt.pdf is very good indeed for audio
applications.

But is there a problem when it comes to LFOs? When a very low frequency LFO
is modulating an oscillator, a discontinuity that would be quite
unnoticeable in an audio signal, is only too obvious. LFOs are definitely a
special - and very awkward - case.

That is why I think a phase locked method is more promising. Although, even
there it won't be without problems, when if comes to settling times in the
PLL. At LFO frequencies, the settling time might be embarrassingly long.

The more I think about it, the better triangles look.

Paul Perry melbourne australia